/
reconciler_controller_stub.go
165 lines (136 loc) · 4.93 KB
/
reconciler_controller_stub.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
Copyright 2020 The Knative Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package generators
import (
"io"
"k8s.io/gengo/generator"
"k8s.io/gengo/namer"
"k8s.io/gengo/types"
"k8s.io/klog/v2"
)
// reconcilerControllerStubGenerator produces a file of the stub of the
// controller for a custom impl with injection.
type reconcilerControllerStubGenerator struct {
generator.DefaultGen
outputPackage string
imports namer.ImportTracker
typeToGenerate *types.Type
reconcilerPkg string
informerPackagePath string
reconcilerClasses []string
hasReconcilerClass bool
}
var _ generator.Generator = (*reconcilerControllerStubGenerator)(nil)
func (g *reconcilerControllerStubGenerator) Filter(c *generator.Context, t *types.Type) bool {
// Only process the type for this generator.
return t == g.typeToGenerate
}
func (g *reconcilerControllerStubGenerator) Namers(c *generator.Context) namer.NameSystems {
return namer.NameSystems{
"raw": namer.NewRawNamer(g.outputPackage, g.imports),
}
}
func (g *reconcilerControllerStubGenerator) Imports(c *generator.Context) (imports []string) {
imports = append(imports, g.imports.ImportLines()...)
return
}
func (g *reconcilerControllerStubGenerator) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
sw := generator.NewSnippetWriter(w, c, "{{", "}}")
klog.V(5).Info("processing type ", t)
m := map[string]interface{}{
"type": t,
"classes": g.reconcilerClasses,
"hasClass": g.hasReconcilerClass,
"informerGet": c.Universe.Function(types.Name{
Package: g.informerPackagePath,
Name: "Get",
}),
"controllerImpl": c.Universe.Type(types.Name{Package: "knative.dev/pkg/controller", Name: "Impl"}),
"reconcilerNewImpl": c.Universe.Type(types.Name{
Package: g.reconcilerPkg,
Name: "NewImpl",
}),
"loggingFromContext": c.Universe.Function(types.Name{
Package: "knative.dev/pkg/logging",
Name: "FromContext",
}),
"contextContext": c.Universe.Type(types.Name{
Package: "context",
Name: "Context",
}),
"configmapWatcher": c.Universe.Type(types.Name{
Package: "knative.dev/pkg/configmap",
Name: "Watcher",
}),
"classAnnotationKey": c.Universe.Variable(types.Name{
Package: g.reconcilerPkg,
Name: "ClassAnnotationKey",
}),
"classAnnotationKeys": c.Universe.Variable(types.Name{
Package: g.reconcilerPkg,
Name: "ClassAnnotationKeys",
}),
"annotationFilterFunc": c.Universe.Function(types.Name{
Package: "knative.dev/pkg/reconciler",
Name: "AnnotationFilterFunc",
}),
"orFilterFunc": c.Universe.Function(types.Name{
Package: "knative.dev/pkg/reconciler",
Name: "Or",
}),
"filterHandler": c.Universe.Type(types.Name{
Package: "k8s.io/client-go/tools/cache",
Name: "FilteringResourceEventHandler",
}),
}
sw.Do(reconcilerControllerStub, m)
return sw.Error()
}
var reconcilerControllerStub = `
// TODO: PLEASE COPY AND MODIFY THIS FILE AS A STARTING POINT
// NewController creates a Reconciler for {{.type|public}} and returns the result of NewImpl.
func NewController(
ctx {{.contextContext|raw}},
cmw {{.configmapWatcher|raw}},
) *{{.controllerImpl|raw}} {
logger := {{.loggingFromContext|raw}}(ctx)
{{.type|lowercaseSingular}}Informer := {{.informerGet|raw}}(ctx)
{{if .hasClass}}
classValue := "default" // TODO: update this to the appropriate value.
{{if len .classes | eq 1 }}
classFilter := {{.annotationFilterFunc|raw}}({{.classAnnotationKey|raw}}, classValue, false /*allowUnset*/)
{{else if gt (len .classes) 1 }}
filterFuncs := make([]func(interface{}) bool, 0, len({{.classAnnotationKeys|raw}}))
for _, key := range {{.classAnnotationKeys|raw}} {
filterFuncs = append(filterFuncs, {{.annotationFilterFunc|raw}}(key, classValue, false /*allowUnset*/))
}
classFilter := {{.orFilterFunc|raw}}(filterFuncs...)
{{end}}
{{end}}
// TODO: setup additional informers here.
{{if .hasClass}}// TODO: remember to use the classFilter from above to filter appropriately.{{end}}
r := &Reconciler{}
impl := {{.reconcilerNewImpl|raw}}(ctx, r{{if .hasClass}}, classValue{{end}})
logger.Info("Setting up event handlers.")
{{if .hasClass}}
{{.type|lowercaseSingular}}Informer.Informer().AddEventHandler({{.filterHandler|raw}}{
FilterFunc: classFilter,
Handler: controller.HandleAll(impl.Enqueue),
})
{{else}}
{{.type|lowercaseSingular}}Informer.Informer().AddEventHandler(controller.HandleAll(impl.Enqueue))
{{end}}
// TODO: add additional informer event handlers here.
return impl
}
`